纵观近几年的高考试题和各地的模拟试题,有很多考查减数分裂的题目.在教学中,笔者发现,在遇到减数分裂过程中涉及异常配子产生的题目时,学生常常由于对减数分裂过程缺乏深刻的理解和认识,解题时感到无所适从.因此本人在讲解过程中,紧扣减数分裂中减数第一次分裂是同源染色体分开,减数第二次分裂是姐妹染色单体分开.通过以母图为依托,进行分析,发现就可以理清脉络,化难为易.现将讲解过程展示出来,愿与同行交流、切磋. Throughout the recent years of college entrance examination exam questions and around the simulation test questions, there are many examining the topic of meiosis.In the teaching, I found that in the process of meiosis involving abnormal gamete problems, students often due to the Meiosis process lacks a deep understanding and understanding of the problem feel puzzled .Therefore, I explain the process, closely linked to meiosis in the first division is the homologous chromosome division, the second division by the number of sisters Chromatic monomers separated by the mother of the map as the basis for analysis and found that we can sort out the context, the difficulty is easy to explain now the process is demonstrated, is willing to exchange and learn from peers.